Anybody know, how to calibrate depth on Suunto ?

[mkotva]

Hello,
I changed defective pressure sensor on my Suunto Cobra, it work fine now again, but in 20m Suunto shows only 18,8m . Anybody know, how to recalibrate it ?

Thanks

MilK

 

[BoltSnap]

Hello,
I changed defective pressure sensor on my Suunto Cobra, it work fine now again, but in 20m Suunto shows only 18,8m . Anybody know, how to recalibrate it ?

Thanks

MilK

How do you know for sure it is reading 18.8m when it should be reading 20m?How did you measure the 20 meter depth?

If it is misreading the depth, nothing you can do about it except sending back to Suunto for repairs.

 

[mkotva]

Thank you for your answer, but that's not what I need to know.
I do not care how I determine whether the data presented are correct or not, I know that are not correct.
I have no interest in sending the computer to the service too, when I changed the sensor by oneself.
I only need the procedure, how to recalibrate the depth data...

 

[tursiops]

I'd say with your attitude, you are on your own.

 

[BoltSnap]

Call up Suunto then, good luck!!

 

[Storker]

20m is 3 ATA, 18.8m is 2.88 ATA. That's a pressure difference of some 4%. IMO that's not very much. In fact, for a consumer grade instrument, it's pretty decent...

 

[Stoo]

I'd say with your attitude, you are on your own.

This.

The difference is minimal. I'd be more concerned if this variance was at 3m/10'.

Any chance it's set on fresh water, not salt?

 

[Storker]

Any chance it's set on fresh water, not salt?

My primary computer is a Suunto Cobra. Never noticed any salt/fresh water setting (not saying the Cobra doesn't have one, only that I haven't noticed it)

 

[BoltSnap]

Any chance it's set on fresh water, not salt?

There is no setting you change for salt and fresh water on the Suunto computers AFAIK. None of my Suunto's have it (I have several of them).

This discrepancy in depth will be alarming to me actually. I dive with two (sometimes 3) Suunto computers and the depth difference is negligible between the wrist mount (D9, Vyper, Stinger) and the console Cobra. If there is any difference between the wrist and Cobra, it is due to the depth difference between the two units since one is on the wrist and one is on a console attached to a d'ring on my bc. Point is that with my experience with Suunto's, the 1.2 meter discrepancy is extremely unusual and I'd be personally alarmed with it.

Since the charming OP is actually doing hardware repairs on the computer on his own, he can figure out this issue and fix it on his own too.

 

[jseyfert3]

This.

The difference is minimal. I'd be more concerned if this variance was at 3m/10'.

Any chance it's set on fresh water, not salt?

My Zoop manual has no setting:

Depth Gauge:
• Temperature compensated pressure sensor.
• Calibrated complying with EN 13319, in fresh water the readings are about 3%
smaller.

If the OP was in freshwater at 20 m, 3 % difference would be 0.6 m, or reading 19.4 m depth. He doesn't say how he knows it's 20 m, or if he's in fresh or saltwater. His reading of 18.8 m is 6% off of 20 m depth, so if he is at exactly 20 m and if he's in freshwater instead of saltwater then his reading is actually only 3% off of actual, which isn't that much (or maybe it is?).

That isn't what he wanted to know though, as he so rudely stated when people where trying to help. My question to the OP is if you replaced the sensor yourself, why can't you figure out how to calibrate it yourself? Likely it can't be calibrated anyway. I'm also guessing the replacement sensor isn't the exact one used by Suunto, and/or doesn't have the quality control Sunnto would use, or the OP damaged something during the replacement.